INA226_15 Datasheet, PDF (1/38 Pages) Texas Instruments – Bi-Directional Current and Power Monitor with I2C Compatible Interface

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
Reference
Design
INA226
SBOS547A – JUNE 2011 – REVISED AUGUST 2015
INA226 High-Side or Low-Side Measurement,
Bi-Directional Current and Power Monitor with I²C Compatible Interface
1 Features
•1 Senses Bus Voltages From 0 V to 36 V
• High-Side or Low-Side Sensing
• Reports Current, Voltage, and Power
• High Accuracy:
– 0.1% Gain Error (Max)
– 10 μV Offset (Max)
• Configurable Averaging Options
• 16 Programmable Addresses
• Operates from 2.7-V to 5.5-V Power Supply
• 10-Pin, DGS (VSSOP) Package
2 Applications
• Servers
• Telecom Equipment
• Computing
• Power Management
• Battery Chargers
• Power Supplies
• Test Equipment
3 Description
The INA226 is a current shunt and power monitor
with an I²C™- or SMBUS-compatible interface. The
device monitors both a shunt voltage drop and bus
supply voltage. Programmable calibration value,
conversion times, and averaging, combined with an
internal multiplier, enable direct readouts of current in
amperes and power in watts.
The INA226 senses current on common-mode bus
voltages that can vary from 0 V to 36 V, independent
of the supply voltage. The device operates from a
single 2.7-V to 5.5-V supply, drawing a typical of 330
μA of supply current. The device is specified over the
operating temperature range between –40°C and
125°C and features up to 16 programmable
addresses on the I²C-compatible interface.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA226
VSSOP (10)
3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
High-Side or Low-Side Sensing Application
Power Supply
(0 V to 36 V)
C_BYPASS
0.1 mF
High-
Side
Shunt
Load
Low-
Side
Shunt
VBUS
V
V_IN+
V_IN–
I
ADC
´
Power Register
Current Register
Voltage Register
Alert Register
VS
(Supply Voltage)
SDA
SCL
2
I C or SMBus
Compatible
Interface
Alert
A0
A1
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.